1 files changed, 1 insertions, 1 deletions
diff --git a/src/types/TranslationsDictionary.d.ts b/src/types/TranslationsDictionary.d.ts
index d9d7e44..5033ecd 100644
--- a/src/types/TranslationsDictionary.d.ts
+++ b/src/types/TranslationsDictionary.d.ts
@@ -4,7 +4,7 @@ import type Locale from './Locale';
 export type Translation<Params> = (params: { [key in keyof Params]: string }) => string;
 
 export type TranslationsDictionary<Raw> = {
-  [key in keyof Raw]: {
+  readonly [key in keyof Raw]: {
     [locale in Locale]?: Translation<Parameters<Raw[key][typeof defaultLocale]>[0]>;
   } & {
     [locale in typeof defaultLocale]: Translation<Parameters<Raw[key][typeof defaultLocale]>[0]>;